BRS Evaluation of Visual Impairment 4

Question 1

A client with retinitis pigmentosa (RP) undergoes dark adaptation testing. Compared to a normal observer, a client with RP would most likely show:

Accepted Answer

Normal cone phase but absent or severely elevated rod threshold in the rod phase

Answer

RP primarily affects rod photoreceptors, so cone-mediated early dark adaptation may be relatively preserved while the rod phase shows absent or markedly elevated thresholds.

Question 2

A BRS specialist notes that a client reads at 40 words per minute with a stand magnifier but 95 words per minute with a CCTV at the same magnification level. This discrepancy most likely reflects:

Accepted Answer

The CCTV's broader field of view and better contrast enhancement allowing faster reading

Answer

CCTVs typically offer a wider field of view and adjustable contrast/brightness, which reduces crowding effects and fatigue, enabling faster reading than equivalent optical magnifiers.

Question 3

Legal blindness in the United States is defined as best-corrected visual acuity of 20/200 or worse in the better eye, OR a visual field:

Accepted Answer

Of 20 degrees or less in the better eye

Answer

U.S. legal blindness criteria include a visual field of 20 degrees or less (diameter) in the better eye, in addition to the acuity criterion.

Question 4

When evaluating a client with cortical visual impairment (CVI), which behavioral feature would most suggest CVI rather than an ocular cause of visual impairment?

Accepted Answer

Visual responses that vary significantly with fatigue, illness, or sensory overload and improve with familiar stimuli

Answer

CVI is characterized by highly variable visual function influenced by fatigue, health status, and environmental complexity, with better responses to familiar or high-interest stimuli.

Question 5

The Smith-Kettlewell Edge Test (SKET) is designed to evaluate:

Accepted Answer

Detection of edges and targets relevant to mobility tasks under low contrast conditions

Answer

The SKET assesses a client's ability to detect edges and objects at low contrast levels that simulate conditions relevant to independent mobility and safe travel.

(BRS) Blind Rehabilitation Specialist Certification Practice Test

(BRS) Blind Rehabilitation Specialist Certification Practice Test

BRS Evaluation of Visual Impairment 4